[1] Chengdu Univ Tradit Chinese Med, Coll Nursing, Chengdu 610075, Sichuan, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Med, Chengdu 610056, Sichuan, Peoples R China
[3] Sichuan Univ, West China Sch Publ Hlth, West China Nursing Sch, Chengdu 610041, Sichuan, Peoples R China
[4] Sichuan Univ, West China Hosp 4, West China Nursing Sch, Chengdu 610041, Sichuan, Peoples R China